Results 21 to 30 of about 2,687,568 (346)
Pairs of trees in tree–tree triangulations
Discrete Mathematics, 2007 AbstractA triangulation T of a compact 2-manifold is said to be a tree–tree triangulation if the graph of T can be partitioned into two induced trees. Hence each tree–tree triangulation is a triangulation of the 2-sphere. Recognizing tree–tree triangulations among all simple spherical ones can be seen to be an NP-complete problem.
Günter Schaar, Zdzisław Skupień
openaire +2 more sources
Rosa funingensis (Rosaceae), a new species from Yunnan, China [PDF]
PhytoKeys, 2023 A new species Rosa funingensis and its variant R. funingensis f. rosea, both collected from Yunnan Province, China, are, for the first time, documented and illustrated in this study.
Ling-Na Zheng +7 more
doaj +3 more sources
Loggia, Arquitectura & Restauración, 2012 The aim of this article is to describe the diagnosis process made on the timber structure that holds up the vault of the Diplomatic Room of the Royal Palace in Naples (Italy).
Donato Calicchio +5 more
doaj +1 more source
Comparative analysis of flavonoids, polyphenols and volatiles in roots, stems and leaves of five mangroves [PDF]
PeerJ, 2023 Mangrove plants contain a variety of secondary metabolites, including flavonoids, polyphenols, and volatiles, which are important for their survival and adaptation to the coastal environment, as well as for producing bioactive compounds.
Zhihua Wu +3 more
doaj +2 more sources
Trees “Pierced” by other Trees [PDF]
Nature, 1874 THE natural phenomenon of one tree within another is very frequently witnessed in India in the case of the “pipal” (vulg. peepul) and the palmyra. The first instance which drew my attention to it was one in which a very large specimen of the former with a stem some 4 ft.
+10 more sources
Transcriptome analysis identifies genes involved in the somatic embryogenesis of Eucalyptus
BMC Genomics, 2020 Background Eucalyptus, a highly diverse genus of the Myrtaceae family, is the most widely planted hardwood in the world due to its increasing importance for fiber and energy.
Yufei Xiao +6 more
doaj +1 more source
, 2020 Stabbing queries in sets of intervals are usually answered using segment trees. A dynamic variant of segment trees has been presented by van Kreveld and Overmars, which uses red-black trees to do rebalancing operations. This paper presents zipping segment trees - dynamic segment trees based on zip trees, which were recently introduced by Tarjan et al ...
arxiv +1 more source
Assessment and valorization of treated and non-treated olive mill wastewater (OMW) in the dry region
International Journal of Recycling of Organic Waste in Agriculture, 2018 Purpose The quantity of Olive by-products does not stop increasing and a water shortage that threatens the olive tree culture; require a serious valuation of these by-products.
Haifa Rajhi +3 more
doaj +1 more source
Tree limits and limits of random trees [PDF]
, 2020 We explore the tree limits recently defined by Elek and Tardos. In particular, we find tree limits for many classes of random trees. We give general theorems for three classes of conditional Galton-Watson trees and simply generated trees, for split trees and generalized split trees (as defined here), and for trees defined by a continuous-time branching
arxiv +1 more source
Synchronization in disordered Josephson junction arrays: Small-world connections and the Kuramoto model [PDF]
, 2004 We study synchronization in disordered arrays of Josephson junctions. In the first half of the paper, we consider the relation between the coupled resistively- and capacitively shunted junction (RCSJ) equations for such arrays and effective phase models ...
A. Pikovsky +8 more
core +2 more sources